`published_at` was an alias for `created_at`, so a release created from
an existing tag reported that tag's commit date as its publication time,
and drafts reported one despite never having been published. It is now
stored separately, set when a release is published and null for drafts.
`created_at` in turn means the date of the commit the release points at,
matching what GitHub documents it to be, and the latest release is
selected by it again. Publishing a release for an old commit no longer
takes over the latest badge, and a tag created in the web UI is dated
the same way as one pushed from the CLI.
Fixes https://github.com/go-gitea/gitea/issues/11206
Fixes https://github.com/go-gitea/gitea/issues/38714
Fixes https://github.com/go-gitea/gitea/issues/31789
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
- Resolves https://codeberg.org/forgejo/forgejo/issues/580
- Return a `upload_field` to any release API response, which points to
the API URL for uploading new assets.
- Adds unit test.
- Adds integration testing to verify URL is returned correctly and that
upload endpoint actually works
---------
Co-authored-by: Gusted <postmaster@gusted.xyz>
